Gas-engine mixing-valve.



PATENTED JAN. 14,. 1908.

ALJ. WEST. GAS ENGINE MIXING VALVE.

AIPLIGATION FILED SEPT. 1, 1904.

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GAS ENGINE MIXING VALVE APPLICATION FILED SEPT.1. 1904.

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Q Vvlmeweo ism controlled by UNTTED STATES PATENT OFFICE.

ARTHURI. WEST, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE WESTINGHOUSE H MACHINE COMPANY, A CORPORATION OF PENNSYLVANIA.

GAS-ENGINE MIXING-VALVE.

Specification of Letters Patent.

Patented J an. 14, 1908.

Application filed September 1. 1904- fierial No. 222.969.

To all whom it may concern:

Be it known that I, ARTHUR J. Wnsr, a citizen of the Unit-ed States, and a residentof Pittsburg, in'the county of Allegheny and a State of Pennsylvania, have invented a new gines and means for controlling the supply of air and gas thereto. I

The means new employed iwith which I am. familiar) for controlling the air and gas supplies to engines, and more especially to large engines (I referparticularlytoengines such as those which have been built within the 'last few years for utilization with blast furnace and producer gases) are more or less costly and for the duties which the are called upon to perform, complicate delicate.

When the governing of such engines is accom lished by the-'so-called gas throttling met od it is essential, when using a lean or poor gas, to increase the relative amount of air admitted-as the gas supply is throttled,

and vice versa, to insure as nearly as possible the admission of a constant volume, and therefore the maintenance of as nearly as possible a constant compression.

To produce simple relatively cheap and efficient means for ulating the supply of air and gas to gas en ines, and varying the relative proportions of air and gas admitted has been an object of this invention.

A further object has been to produce relatively simple means whereby the relative proportions of air and gas admitted are automatically changed either according to the load demands or the changes in the-speed of the engine. v

- A still further ob'ect has been to produce means, which, in a dition to having the capabilities as above outlined is so constructed that the normal relative proportions of air and gas admitted may be varied or adjusted to'suit the-gas used. i

These as well as other objects I attainin the means described in this specification and:

illustrated in the drawings presented herewith throughout which correspondingelements are denoted by like characters.

' The engine,'the overnor and the mechanand governor rod is reciprocated the 'iston va will :reciproc ations e governor for actuating the governor rod (hereinafter referred to) and the mechanism for reciprocatin the admission valve have been omitted om the drawings, as they form no partof this particular invention, and further, as their construction and details may be varied to suit the many conditions encountered.

In the drawings Figure 1 is a sectional elevation of a device embodying this invention, and Fi 2 illustrates in perspective several of the e ements enteringinto the make-up of the means for actuating. the air and gas valves hereinafter referred to.

The device consists of a valve casing 3 bolted or otherwise secured to the engine cylinder and provided with a valve seat for a reciprocable puppet" valve 4, preferably 0. the mushroom type. Axially in line. with stem 5 of said valve and included within casing 3, is a casing 6 having a bore 7 provided with as ports 8 and a gas inlet passage 9.

Va ve casing 3 is provided with an air assage l0, and a valve 11 preferably of t p: al anced butterfly type ismounted with' air passage and provided with a rotatable said stem 12 extending up through the top of casing 3. A piston valve 13- provided with ports 14 of the same shape, number and size as ports- 8 is carried'by stem.5 of the admission valve within bore 7 of casing 6, and a displacer' head 15 is for; ;ed integral with the piston valve whereby, as saidvalve is depressed,

.said head will displace the gas and air which lie below it;

If desired the piston valve may he formed so as to rotate relativeflto the admission valve to vary the effective area of the gas ports, but'this is not necessary as the piston valve when rotated to vary the effective area of said ports may carry with it the ad'- mission'valve.

' A reciprocable governor rgid16 controlled by the engine governor and mounted in any suitable manner is connected to the piston valve by means of a link 17 and an armfl connected to said piston-valvestem. this construction it will be seen tliat as th berotated,and thereby. tie effectW. area of the gas ports varied when the port formed in the pistonu'valve areopposite the.

valve casing' bore during the i of thepieton and, admission ports 8 of the Link 17, each end of which carries a ball 'f nounted in a cooperatin sock ft,-as shown, in Fig. 2, is of sufficient ength that the its of oscillations of the piston valve durin reciprocations due to the fixed lengt link 17 will be negligible and will not mateprovided with a plurality of openings 22 adapted to carry a pin '23 which projects therethrough and lies between the furcate' parts of member 19. Surrounding reduced portion 20, adjustable thereon and rigidly secured in its adjusted position is a member 24 carryingtwo springs 25 which embrace a downwardly projcctin portion 26 of valve lever 21, (it will be un erstood that in the drawings valve lever 21 is shown in an inverted position for thesake of illustration and when in operative position will stand so I that pin 23 projects downwardly between the furcate'parts of member 19 and tend to yieldingly hold the valve in it's normal posit'on J J In will be seen that by rotating member '24 the normal-position of the butterfly valve 11 may be chan ed and it will further beseen that as member 19 is oscillated the butterfly valve may be oscillated to either, increase or decrease the effective area "through the valve according to the position of pin 23 that is, according to which of the holes 22, pin 23 projects through.

It will be seen that by means of this lost motion mechanism between the governorrod and valve 11 the relative proportions of the air and desired.

It will be understood that any means for accomplishing a variation in the 'relative' movements of the gas and-air valves ma be utilized and-a lost motion connection is not necessary but in some cases may be desirable. j Many changes may be made in the .forms and ai..an ment of the several elements comprised 1 themake-up of the means illusgas admitted may be varied as 'trated with ut departing from my invention,

since.

I claim: i 1., In combination in a gas engine, antadmission valve,a rotatable reciprocably mounted as valve, an air valve, a variably reciprocab e :member dependent upon the en ine speed for controlling said air and gas va ves and a regulable lost motion connection between said air valve and said member.

2. In combination in a gas engine, a reciprocable admission valve, a gas valve, an air valve, a movable member dependent upon the engine-speed for regulating said air valve, a lost motion connection between said member and said air valve, and means for varyinglthe'amoun t of said lost motion.

3. In combination in a gas engine, a recipand (le endent upon the engine speed for control ing said gas and air valves to vary the gas and air supplies.

4. In combination in a gas engine, a reciprocable admission valve, a gas throttling piston-valve movable with said admission valve and rotatable to vary the gas suppl an airvalve, means operatable during t e reciprocations of said admission valve and dependent upon the; engine speed .for controlling said gas and air valves tovary the as and air supplies and instrumentalities or varying the relative proportionsof air and gas'a'dmitted. ,5. In combination in a gas engine, amixture admission valve, a ported valve casing axially in line therewith, a rotatable pistonvalve carried by' the admission valve stem-- within said casing and provided with ports at times adaptedto register with the ports of. said casing, an air supply, a displacer head carried by said. admission valve stem within .said casing, means for-varying therelative proportions of air and gas passing said 'admission valve, and instrumentalities for,ro'-; tating said iston valve to vary the effective area of sai ports'coincident with the speed variations.

.6. In combination' in a gas engine, an ad- I mission valve, a rotatable reciprocably mounted as valve, an a r valve, a variably reciprocab e member dependent upon the 'englne speed for regulating said air'and gas va ves and a re lable connection between said air valve an said member.

-' 7. In combination in a gas engine, a reciprocable admission valve, a gas valve, an. air valve, a movable member dependent u on the engine speed for regulating said air va vs, a lost motion connection between said member and said air valve, means for varying the amount of said lost motion and a ents tending to yieldingly hold said air'va ve in normal position. I I a 8. In combination in a gas engine, a mixture admission valve, a gas valve, an air valve, a variable reciprocating'member dependent upon the speed of the engine for controlling said gas and air valves, and a device comprising two springs between said air valve and said member for'returning said air valve to its normal position.

9. In combination in a gas engine, a mix-.-

ture admission valve, a ported valve casing axially in line therewith, a rotatable piston valve carried by the valve stem for said admission valve and provided with ports adapted to cooperate with the ports of said casing to control the passage of fluid therethrough,

- an air supply, adisplacer head carried by said piston valve stem within said casing, and means, dependent upon the speed of the engine, for rotating said pistonvalve to vary the effective area through the ports of said casing.

- a 1 10. In combination in a gas en ine, a reciprocable mixture admission va ve, a gas throttling piston valve movable with said admission valve, an air valve, and means, dependent upon the speed of the engine, for rotating said piston valve and said air valve.

11. In combination 'in a gas engine, areciprocable mixture admission valve, 8; gas

throttling piston valve movable with'said admission valve, an airvalve, means depend- .ent upon the speed of the engine for o crating .saidpiston valve and said air va ve' to control'ithe supply of air and gas and means for independently adjustingsai airvalve.

.12. In combinationin a gas engine, a reciprocable mixture admission valve, agas valve, an an valve, a movable member whichdepends upon the speedof the engine for its position and WhlCh controls said air and said.

gas valves, a lost motion connection between said member and said air valve, and means for yieldingly holding said" air valve to its normal adjustment.

13. In combination in a gas engine, 'a re- .c1procable'm1xture admlssion valve, an an valve, a movable member which depends upon the speed of the engine for'its position and which regulates said air'valve, and a;

regulable connection comprising two s rings between said member; and said air va ve. 14. In combinatlon n a gas engine, a recarried by said admission valve, an air valve, means, dependent upon the speed of the en-.

gine, for varying the position of said gas valve andsaid air valve, and'an adjustable lost motion connection between said means and said alr-valve for varying the relative proportion "of air and gas passing'said" admission valve.

16. In combination in a gas engine, a mix ture admission valve, a g'as valve, anair valve, and means, dependent upon the speed of the engine, for varying the position of said gas and said air valves, andcomprising a lost motion connection for said air valve, em-' bodying a spring restrained lever rigidly conneqted to said air valve.

' v1-7. In combination in a gas engine, a mixture admission valve, a gas valve, an air \valve, and means, dependent upon the speed of the engine, for varying the position of said air and said gas valves, comprising a lost motion connection for said' air valve, embody- 'ing a spring restrainedlever rigidly'conne cted to said air valve, a movable contact pin,

and a member for contacting with said pm,

actuated by-said means.

In testimony whereof, I have hereunto subscribed my name this 31st dayof August,

ARTHUR J. WEST. Witnesses:

. J. D. DoUenERTY, DAVfi) WILLIAMS. 

